My suggested list of terminal commands for your brand new PocketCHIP.
First off, edit your /etc/apt/sources.list
file to look like this:
deb http://deb.debian.org/debian/ jessie main contrib non-free
deb-src http://deb.debian.org/debian/ jessie main contrib non-free
deb http://security.debian.org/ jessie/updates main contrib non-free
deb-src http://security.debian.org/ jessie/updates main contrib non-free